/* css/animations.css - Shared keyframes, reveal animations, page transitions */

/* Base fade-slide-up keyframe */
@keyframes fade-slide-up {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* Hide char-reveal text until JS splits it */
.char-reveal {
    visibility: hidden;
}

.char-reveal[data-split] {
    visibility: visible;
}

/* Character split reveal */
.char-reveal .char {
    display: inline-block;
    opacity: 0;
    transform: translateY(100%) rotate(5deg);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.char-reveal.visible .char {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
}

/* Stagger delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }
.stagger-7 { transition-delay: 0.7s; }
.stagger-8 { transition-delay: 0.8s; }

/* Page transitions */
.page-exit {
    animation: pageExit 0.5s ease forwards;
}

.page-enter {
    animation: pageEnter 0.5s ease forwards;
}

@keyframes pageExit {
    to { opacity: 0; transform: translateY(-20px); }
}

@keyframes pageEnter {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Breathing glow */
@keyframes breathe {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 229, 155, 0.2); }
    50% { box-shadow: 0 0 40px rgba(0, 229, 155, 0.4); }
}

/* Pulse animation */
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* Gradient shift */
@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Spinning border */
@keyframes spin-border {
    to { transform: rotate(360deg); }
}

/* Floating */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* Pulse glow */
@keyframes pulse-glow {
    0% { opacity: 0.15; }
    100% { opacity: 0.35; }
}

/* Tier 3: CSS-only fallback for devices without WebGL */
[data-tier="3"] body {
    background: linear-gradient(135deg, #06080d 0%, #0a1a15 25%, #0d0a1a 50%, #060d14 75%, #06080d 100%);
    background-size: 400% 400%;
    animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

[data-tier="3"] #scene { display: none; }
[data-tier="3"] .cursor-dot,
[data-tier="3"] .cursor-ring { display: none; }

/* Reduced motion overrides */
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; }
    .char-reveal .char { opacity: 1; transform: none; }
    .page-exit, .page-enter { animation: none; opacity: 1; transform: none; }
}